Coding scheme indication for 802.11bn

Abstract

An apparatus and method of signaling coding type is disclosed. The coding types include binary convolutional coding (BCC), legacy lifted Low-Density Parity Check (LDPC) code, and lifted LDPC code having a length that is a multiple of the maximum legacy LDPC code. The number of bits used to indicate the coding type in a User Info field depends on whether multiple lifted LDPC codes are available for encoding, whether the lifted LDPC code is an optional coding type, or a payload size. The frame containing the User Info field is transmitted to another STA and the response contains a payload encoded using the indicated coding type.

What is claimed is: 
     
         1 . An apparatus of an access point (AP), the apparatus comprising:
 memory; and   processing circuitry coupled to the memory, the processing circuitry to configure the AP to:
 determine at least one of a first coding type of a payload of an ultra high reliability (UHR) downlink physical (PHY) layer downlink protocol data unit (PPDU) or a second coding type for an uplink PPDU from a station (STA); 
 indicate at least one of: the first coding type in a coding type subfield in a User field of a preamble of the downlink PPDU or the second coding type in a User Info field of a trigger frame in the uplink PPDU, coding types able to be indicated including a lifted Low-Density Parity Check (LDPC) code, a number of bits used to indicate the coding type in the User field dependent on at least one of whether multiple types of lifted LDPC codes are available for encoding or a payload size; and 
 transmit the downlink PPDU to the STA. 
   
     
     
         2 . The apparatus of  claim 1 , wherein the processing circuitry configures the AP to use multiple bits to indicate at least one of the first coding type or second coding type. 
     
     
         3 . The apparatus of  claim 1 , wherein the processing circuitry configures the AP to use multiple bits to indicate at least one of the first coding type or second coding type in response to a determination that lifted LDPC codes having different bit lengths are available to be used for encoding. 
     
     
         4 . The apparatus of  claim 1 , wherein the processing circuitry configures the AP to use multiple bits to indicate at least one of the first coding type or second coding type in response to a determination that a single lifted LDPC code type is available to be used for encoding. 
     
     
         5 . The apparatus of  claim 4 , wherein at least one value of the bits is reserved for later use. 
     
     
         6 . The apparatus of  claim 1 , wherein the processing circuitry configures the AP to use a single bit to indicate at least one of the first coding type or second coding type in response to a determination that a legacy LDPC code and at least one type of lifted LDPC code are available to be used for encoding and the at least one type of lifted LDPC code is not an optional coding type, selection of a specific coding type using one of the lifted LDPC codes determined by a size of a Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) payload or medium access control layer (MAC) payload of a response to the trigger frame. 
     
     
         7 . The apparatus of  claim 6 , wherein selection of the specific coding type comprises use of the legacy LDPC code for a PPDU payload or MAC payload less than a first threshold, a first lifted LDPC code having a first bit length for a PPDU payload or MAC payload at least the first threshold and less than a second threshold, and a second lifted LDPC code having a second bit length for a PPDU payload or MAC payload at least the second threshold, the second bit length being longer than the first bit length. 
     
     
         8 . The apparatus of  claim 1 , wherein the processing circuitry configures the AP to use multiple bits to indicate at least one of the first coding type or second coding type in response to a determination that at least one LDPC code is not an optional coding type and that at least one lifted LDPC code is available to be used for encoding and is an optional coding type. 
     
     
         9 . The apparatus of  claim 1 , wherein the at least one LDPC code includes a legacy LDPC and the lifted LDPC code. 
     
     
         10 . The apparatus of  claim 9 , wherein selection between the legacy LDPC and lifted LDPC code is determined by a size of a Physical Layer Convergence Procedure (PLCP) Protocol Data Unit (PPDU) payload or medium access control layer (MAC) payload of a response to the trigger frame such that the legacy LDPC is used for a PPDU payload or MAC payload less than a threshold, and the lifted LDPC code is used for a PPDU payload or MAC payload of at least the threshold. 
     
     
         11 . The apparatus of  claim 1 , wherein the User field is in an ultra high reliability SIGNAL (UHR-SIG) field. 
     
     
         12 . The apparatus of  claim 1 , wherein the processing circuitry configures the AP to send a multi-user PPDU to multiple STAs, the multi-user PPDU containing a different coding type subfield in a user fields for each STA. 
     
     
         13 . The apparatus of  claim 1 , wherein the processing circuitry configures the AP to set to a value in the user info field to 0 to indicate binary convolutional coding (BCC) and to a non-zero value to indicate the lifted LDPC code. 
     
     
         14 . An apparatus of a station (STA), the apparatus comprising:
 memory; and   processing circuitry coupled to the memory, the processing circuitry to configure the STA to transmit, to an access point (AP), one of:
 a non-trigger-based frame that is contained in an ultra high reliability (UHR) payload of a physical (PHY) layer protocol data unit (PPDU) having a first payload encoded using a first coding type selected from a group of coding types that include binary convolutional coding (BCC), legacy Low-Density Parity Check (LDPC) coding, and lifted LDPC coding, a number of bits used to indicate the first coding type dependent on at least one of whether multiple types of lifted LDPC codes are available for encoding or a payload size of the first payload, or 
 a trigger-based frame that is contained in an UHR payload of a PPDU having a second payload encoded using a second coding type selected from the group of coding types as indicated by a User Info field of a trigger frame from the AP, a number of bits used to indicate the second coding type dependent on at least one of whether multiple types of lifted LDPC codes are available for encoding or a payload size of the second payload. 
   
     
     
         15 . The apparatus of  claim 14 , wherein multiple bits are used to indicate the at least one of the first coding type or second coding type based on availability for encoding of multiple lifted LDPC codes having different bit lengths or of a single lifted LDPC code. 
     
     
         16 . The apparatus of  claim 14 , wherein a single bit is used to indicate the at least one of the first coding type or second coding type based on a legacy LDPC code and at least one type of lifted LDPC code being available to be used for encoding and the at least one type of lifted LDPC code is not an optional coding type, selection of a specific coding type using one of the lifted LDPC codes determined by a size of a PPDU payload or medium access control layer (MAC) payload of a response to the trigger frame. 
     
     
         17 . The apparatus of  claim 16 , wherein selection of the specific coding type comprises use of the legacy LDPC code for a PPDU payload or MAC payload less than a first threshold, a first lifted LDPC code having a first bit length for a PPDU payload or MAC payload at least the first threshold and less than a second threshold, and a second lifted LDPC code having a second bit length for a PPDU payload or MAC payload at least the second threshold, the second bit length being longer than the first bit length. 
     
     
         18 . The apparatus of  claim 14 , wherein multiple bits are used to indicate the at least one of the first coding type or second coding type in response to at least one LDPC code not being an optional coding type and that at least one lifted LDPC code is available to be used for encoding and is an optional coding type, the at least one LDPC code including a legacy LDPC and the lifted LDPC code. 
     
     
         19 . A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of an apparatus of an access point (AP), the instructions to cause the one or more processors to:
 determine at least one of a first coding type of a payload of an ultra high reliability (UHR) downlink physical (PHY) layer downlink protocol data unit (PPDU) or a second coding type for an uplink PPDU from a station (STA);   indicate at least one of: the first coding type in a coding type subfield in a User field of a preamble of the downlink PPDU or the second coding type in a User Info field of a trigger frame in the uplink PPDU, coding types able to be indicated including a lifted Low-Density Parity Check (LDPC) code, a number of bits used to indicate the coding type in the User field dependent on at least one of whether multiple types of lifted LDPC codes are available for encoding or a payload size; and   transmit the downlink PPDU to the STA.   
     
     
         20 . The medium of  claim 19 , wherein the instructions further cause the one or more processors to use multiple bits to indicate at least one of the first coding type or second coding type.